Automatic plate valve



lvl'. RTESNER. AUTOMATIC PLATE VALVE.

UNITED' STATES.

MICHAEL RIESNER, OF CINCINNATI,

ASSIGNOR TOl WORTHINGTON PUMP AND MACHINERY CORPORATION, A CORPORATION 0F VIRGINIA.

'Auromrc-'rn VALVE i I Specification of Letters Patent. Patented May 30, 1.922.

Application med April 1s, 1920, serial No. 973,609. 'Renewed Maren 2, 1922. serial No. 540,6'13.

To all-whom t may concern.'

Be it known that I, MICHAEL RIESNER, a citizen of the United States, residing at Cincinnati, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Automatic Plate Valves, fully described and represented in the following specilication and the accompanying drawings, forming a part of the same.

This invention relates especially to valve constructions of the type generally set 'forth in the reissue patent to Meyer, No. 13,991, August 2, 1915, that is to say, valves consisting `of thin elastic strips of metal ywhich are so held at their ends that, when under fluid pressure, they bend at their centers towards and away from their ports to open and close the same. y,

The present invention has for its especial object to produce a constru-ction employing valves of the type referred to, which shall be cheap to construct, which shall be efficient inoperation and which presents advantages in the matter of assembling the construction.

With these and other objects not particularly referred to in view, the invention consists in certain constructions, and in certain parts, improvements and combinations, as will be hereinafter fully described and then specifically' pointed out.

Referring to the drawing,

Figure 1 represents a vertical section of -a part of the compressor embodying the im-A proved construction.

, Figures 2 and 3 are sections on the lines 2 2 and 3 3, -resepectively, of the construction shown in Fig. 1.

Figure 4 is ra ,horizontal section on the line 4 4 of Fig. 1. Y

Figures 5, 6 and 7 are detail views.

Referring to the drawings which illustrate a concrete embodiment of the invention, 1 in# dicates a compressor casing having a compressor chamber otr cylinder 2 1in which works a piston 3, the compressor having in- -let and outlet' chambers and ports 4 and 5.

The compressor chamber or cylinder is closed by a port plate 6 having cylinder ports 7 and 8 formed therein. In the construction illustrated, the port 7 is formed at the bottom of a recess in the outer side of A the plate, and, in the construction shown, is less 1n length and width than the recess,

with the result that shoulders 9, which constitute a valve seat,-are formed at lthe sides of the port, and valve supports 10 are formed at the ends of the port. In what are regarded as the best constructions, these shoulders 9 and valve supports 10 are formed on a curve which dips toward the transverse center of the port. The port 8 is formed at the bottom of a recess cut in the inner side of the portv plate 6 and this port, in the construction shown, is also less in length and width than the recess, so as to form shoulders which constitute a seat for the valve and supports on which the valve rests at its ends, the seat and support also being formed on a curve.

The valvesconsist of thin elastic strips 11 and 19 of metal which when properly held at their ends will Hex at their centers to open and close the ports. Where the specific construction of inclined seats and supports, such as herein shown, are employed, the valve strips will be formed on a curve which corresponds to the curve'of the seats and shoulders. This may readily be accomplished by passing the valve strips through rolls which` glve them a set, so that they have the curve referred to.

Means are provided for holding or confining the lvalve strips at their ends so as to leave them'free-to flex at the centers to open and close in the manner characteristic of valves of the type referred to. While these may vary, in the particular construction shown, for thevalve strip 11 a cap 12 is pro-l vided, this cap having an inwardly projecting boss 13 through which passes a screw 14, thisvscrew being threaded into plate 6 and holding the parts together. This cap has side anges 15 which overlie the ends of the recess in which the port 7 is formed, and, consequentl ,overlie the valve supports 10. The ends o the valve strip are, therefore, so held between the supports and these flanges' that the valve strip 11 'is free to iex and will thus move towards and away `from its port to open and close the same.

In the particular construction illustrated, for the valve strlp 19 there is provided a slotted guard plate 16 whichl is located between the port plate 6 and the compressor chamber, this plate being secured to the vport plate by screws which pass through holes 17 in the guard plate and into the port plate. If desired, this'guard plate may beprovided with a positioning rib, as .18, which takes into a recess in the port plate 6, so that in assembling the screw holes 17 may be brought accurately into register with the corresponding screw holes in the port plate..

The edge of this guard plate, as shown 1n Fig. 3, for instance, overlies the ends of the recess in which theV port 8 is located, and the valve supports in said recess. This' guard plate, therefore, which may, as shown, be located on a shoulder, as 20, formed at the end of the compressor. chamber, assists in holdy ing valve strip 19 at'its ends but permits it to flex to open and close its ports.

If desired, means may be provided for 11miting the flexing movement Aof the valve,

' strips 11 and 19. While these means maybe varied, in the particular construction shown, the cap 12 has a downwardly projecting rib 21 against which the valve strip 11 will abut when it is opened to the desired extent. As

` shown, the opening or flexing movement of the rest tion.

the valve strip 19 is limited by an integral section 22 between the slots of the guard plate 16, this section being so positioned that the valve 19 will abut against it when itis opened to the desired extent. As shown,

the port plate 6 is provided with inlet and outletports 23, 24 which communicate with the inlet and outlet ports 4, 5 and lead into the chamber formed in the cap 12.

It will ybe understood that with the construction as described,'the port plate, the valves, the cap and the guard plate can be easily assembled, and that the recesses in which the thin flexible valve strips are located permit the same to be positioned in the ,structure during assembly without danger that'they will become misplaced while of the parts are being put in posi- It will be understood that changes and vai .riations may be madein the construction herein shown and described wfithout depart- A- ing` from the invention, and that the invention claimed is not confined to such con- .'struction.' While the invention relates esing valve supports at its ends formed on a,

curve which dips toward the center of the port formed through the seat, of a thin normally curved plate valve cooperating with said seat to open and close the port therethrough, the ends of the valve normally resting freely on said supports, the valve flexing .during this opening and closing movement and its ends being free to permit said flexing.'

3. A port plate having a recess therein, a port cut through its bottom of less length than the recess, whereby valve supports are formed at the ends of the port which are below the surface of the plate,'a thin flexible valve strip, the ends of which normally rest freely on said supports, and means for confining the strip at its ends on said supports thereby leaving the valve free to flex to open andl close the port.

4. lA port plate having a recess therein, a port cut through the bottom of the recess of less length than the recess, whereby valve supports are formed at the ends of the port which are below the surface of the plate, said valve vsupports being inclined toward the centerof the port, a normally curved thin flexible valve strip, the' ends of which normally rest freely on said supports, and means for confining the strip at its ends on said supports, thereby leaving the valve free to flex to open and close the port.

5. A port plate having a recess therein, a port cut through the bottom of the recess of less length and width than the recess, where'- by shoulders which constitute a valve seat are formed at'the sides of the port and valve supports areformed at the ends of the port, a thin flexible valve strip, the ends of which normally rest freely on said supports, and means for confining the valve at its ends on said supports, thereby leaving it free to flex to open and close.

6. A port plate having a recess therein, a port o f less length and width than the recess cut through the bottom of the recess,l whereby shoulders which constitute a valve seat are formed at the sides of the port and valve supports are formed at the `ends of'. the port, said shoulders and supports-being formed on a curve which dips toward` the center of the port, a normally curved thin flexible valve strip, the ends of which -normally rest freely on said supports, and means for confining the valve at itsends on said supports thereby leavingit free to flex to open and close.

7. A port plate lhaving a recess therein, a port of less length than the length ofthe recess cut through the bottom of the recess, whereby valve supports are formed at the ends of the. port which are below the surface of the plate,a thin flexible valve stripthe ends of which normally rest freely on said supports, means for confining the valve at its ends on said supports, thereby leaving it free' to flex to open and close, and means for determining the opening movement of the valve.

8. A port plate having a recess therein, a port of less length and width than the recess cut through Vthe bottom of the recess,

whereby shoulders which constitute a valve seat are formed at the sides of the port, and

valve supports are formed at the ends of the port, a thin flexible valve strip the en'ds of which normally rest freely on said supports, means for confining the valve at its ends on said supports, thereby leaving it free to flex to open and close, and means for determining the opening movement of the valve.

9. A port plate having a recess therein, a port of less length and width than the recess cut through the bottom vof the recess, whereby shoulders which constitute a valve seat are formed at the sides of thefport and valve supports are formed at the ends of the port, said shoulders and supports being formed on a curve which dips toward the center of the port, a normally curved flexible valve strip the ends of whichnormally rest'freely on said supports, means for confining the valve strip at its ends on said supports, whereby it is left free to flex to open and close, and means for determining the opening movement of the valve.

10. The combination with a cylinder and its piston, of a port plate having recesses in opposite sides thereof, ports of less length being formed on a curve which dips toward the center of the ports, normally curved flexible valve strips the ends of which normally .rest freely on said supports, and means for confining the valve strips at their ends, tiereby leaving them free to flex to open and c ose.

11. Thecombination with a cylinder and its piston, of a port plate having recesses in opposite sides thereof, ports less in length and width than the recesses cut through the bottoms thereof, whereby shoulders which constitute a valve seat are formed at the sides of the ports, and valve supports are formed at the ends of the ports, said supports and shoulders being formed on a curve which dips toward the center of the ports, normally curved flexible valve strips the ends of which normally rest freely on said supports, means for confining the valve strips at their ends, thereby leaving them free to flex to open and close, and means for determining the opening movement of the valve strips.

12. The combination with a cylinder and its piston, of a port plate having recesses in oppositevsides thereof, ports of lesslength and width than the recesses cut through the bottoms thereof', whereby shoulders which constitute Valve seats are formed at the sides of the ports and valve supportsat the ends of the ports, said supports and seats being formed onl a curve which dips toward the l'center of the ports, flexible valve strips on the supports, a slotted guard plate between the port plate and the chamber in the cylinder, said plate' lconfining the valve strip on the inner side of the plate port to the supports 'but leaving it free to flex to open and having a section which determines the opening movement of the valve strip, and a cap covermg the port plate, said cap confining the end of the valve strip in the recess confining the valve at its ends on said sup-Y A ports.

14. A ort plate having a recess therein, a port o less length than the length of the recess cut through the bottom of the recess, whereby valve supports are formed at the ends of the port which are below the surface of the'plate, a valve strip the ends of which normally rest freel'y on said supports, means for confining the valve at its ends on said supports, and means for determining the openino' movement of the valve.

15. port plate having a recess therein, a port of less length and width than the recess cut throu h thebottom of the recess, whereby shoulders which constitute a valve seat are formed at the sides of the port, andil valve supports are formed at the ends of the port, a valve strip the ends of which normally rest freely on said supports, Vmeans Ifor confining the valve at its ends on said supports, and means for determining the and means for loosely confining said valve mit ilexing in the direction tending to while permittinglexing in the direction straighten" the valvein opening and llniptendin to straighten the valve in opening. ing the opening movement'of the valve. 10

l18. valve seat having a concave surface, In testimony whereof, I have hereunto set 5 a normally curved plate valve of thin elasmy hand. v

tic material seating on Said concave surface, I 1 and a cap loosely confining the valve to pery l RIESNER. 

